Bruker Eas Gmbh

Carl Buehler

Klaus Schlenga

Bernd Sailer

Manfred Thoener

Vital Abaecherli

Matheus Wanior

A monofilament () for producing an NbSn-containing superconductor wire () includes a powder core () with an Sn-containing powder, a reaction tube () composed of an Nb alloy that includes Nb and at least one further alloy component X. The powder core is disposed within the reaction tube. The monofilament also includes at least one source () for at least one partner component Pk. A respective source includes one or more source structures at a unitary radial position in the monofilament. The alloy component X and the partner component Pk form precipitates XPk on reaction annealing of the monofilament in which Sn from the powder core and Nb from the reaction tube react to produce NbSn. The powder core is disposed in a moderation tube, which in turn is disposed within the reaction tube. This provides a monofilament for a powder-in-tube based NbSn-containing superconductor wire with improved current carrying capacity.

Monofilament for producing an NbSn-containing superconductor wire, especially for internal oxidation

A subelement () for an NbSn-containing superconductor wire includes

Subelement based on Nb-containing rod elements with powder-filled core tube for an NbSn-containing superconductor wire, and associated production method

For producing an Nb3Sn superconductor wire, restack rod process (RRP) subelements () are grouped to form a bundle having an approximately circular cross section and are arranged together with filling elements (-) in an internally and externally round outer tube (). To the inside the filling elements form a serrated profile () for abutment against the hexagonal subelements, and to the outside they form a round profile () for direct or indirect abutment in the outer tube. In fabricating the RRP subelements, and before a reshaping with a reduction in cross section, an externally hexagonal and internally round casing structure () is provided, into which the remaining parts of the subelements are inserted, in particular, an annular arrangement of hexagonal Nb-containing rod elements (), which are surrounded externally by an outer matrix () and internally by an inner matrix ().

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Langenselbold, Germany

Carl Buehler